extras: /etc/init.d/glusterd should create a lockfile under /var/lock/sybsys

Without a lockfile under /var/lock/subsys, the glusterd service is not
stopped on shutdown or reboot.

Change-Id: I9dc9b4204c5c39879c22191b2e8a2b81a4f3a58a
BUG: 960476
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/4960
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>